Remote control type drilling bypass circulation valve

Abstract

The invention relates to a remote control type drilling bypass circulation valve, belonging to valves special for underground leakage stoppage in drilling process. The invention is characterized in that a control mechanism and a switch mechanism are respectively arranged at the middle upper part and the middle lower part in a case. The control mechanism is composed of a control body, a control nozzle, a return spring and an upper seal ring. The control nozzle is arranged in the upper port of the control body, the return spring is sheathed at the middle lower part outside the control body, andthe upper seal ring is arranged at the joint of the upper end part of the control body and the inner wall of the case. The switch mechanism is composed of a switch body, a guide pin, an upper bearing, a lower bearing and a lower seal ring. The guide pin is arranged at the upper part of the switch body, the upper bearing is arranged at the upper port of the switch body, the lower bearing is arranged at the lower port of the switch body, and the lower seal ring is arranged at the middle and lower parts of the switch body. The invention has the advantages that a drill column is not required to be taken out when leakage is occurred in drilling process, a pump is stopped and started, so as to remotely control the bypass valve to be open, and the valve is closed by remote control after circulation leakage stoppage is completed. Drilling stop time is reduced, leakage stoppage is timely and reliable, and accident complication is avoided.

Description

(1) Technical field [0001] The invention relates to a downhole tool for drilling, which belongs to a valve device specially used for downhole leak plugging by bypassing drilling fluid. Specifically, it is a remote control drilling bypass circulation valve. (2) Background technology [0002] At present, when drilling deviated wells or even vertical wells in various oil fields, downhole motors and wireless measurement-while-drilling instruments (MWD) are generally used. In some areas or fault blocks, well leakage often occurs when drilling, so the leakage leakage operation must be carried out with the leakage prevention material. However, after the plugging material is added, the downhole motor or MWD will not be able to circulate. If the drill is pulled out to change the drilling tool, it will not only waste a lot of time, but in some cases, the wellbore liquid level will drop after the drill is pulled out, which will easily lead to collapse or blowout, causing more serious ...

AI Technical Summary

Problems solved by technology

In this case, although the wellbore can be prevented from collapsing or blowout when pulling out the drill, it still takes two trips to get up and down the drill, wasting a lot of time

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